Antique Cast Iron Single Sad Iron Heater Unmarked

This auction is for an old single sad iron heater that is not marked anyw It is made of cast iron and brass with a cork stopper. It is about 8 1/2" tall by 6" by 3 1/2". It is in great condition with a good wick and a mica window. The widow has an internal mark, but is still solid and in one piece. It is very clean and original and no apparent damage.